Amp fans, what's your take?

Discussion in 'Amps and Cabs' started by Optimus Rhyme, May 7, 2015.

  1. Optimus Rhyme

    Optimus Rhyme Member

    Messages:
    177
    Joined:
    Jul 8, 2014
    Location:
    Ontario, Canada
    So I just de-soldered the leads to the fan on my Budda SD45 head (runs KT66s) because the fan was driving me nuts. It's completely reversable, but I was thinking about installing a simple switch in case I ever wanted to turn the fan on. But at this point I can't see the need, I have a bunch of amps that run way hotter than this amp and they don't have a fan built in. I also unplug the fan to my Mesa Mark III Head and it's quiet as a mouse. So what gives? Do you guys run the fan or not?
     
  2. sleewell

    sleewell Member

    Messages:
    8,184
    Joined:
    Sep 10, 2012
    Location:
    Michigan
    My take is if you can hear the fan you aren't turned up loud enough.
     
  3. Optimus Rhyme

    Optimus Rhyme Member

    Messages:
    177
    Joined:
    Jul 8, 2014
    Location:
    Ontario, Canada
    Even at loud band volumes it still drives me nuts. I'm less sensitive to cone cry than I am to the fan. Seriously.
     
  4. somedude

    somedude Member

    Messages:
    6,810
    Joined:
    May 30, 2004
    Location:
    South of Heaven
    I'm assuming by "loud band" you mean an acoustic trio?

    I couldn't hear the fan in my Mark III over the sound of awesomeness eminating from the speaker.
     
  5. DaveKS

    DaveKS Member

    Messages:
    15,907
    Joined:
    Feb 26, 2013
    Location:
    KS
    Maybe you just need a more "Boutique" fan. Something hand wound with 100% oxygen free copper windings. :rolleyes:
     
  6. DeaconBlues

    DeaconBlues Member

    Messages:
    2,990
    Joined:
    May 2, 2007
    Location:
    way down below the ocean...
    None of my amps have fans.

    Except for me...I love them all.:love:
     
  7. rummy

    rummy Member

    Messages:
    8,565
    Joined:
    Jul 12, 2008
    Location:
    Chicago
    How is this possible?
    My Boogie Mark IV and SD30 both have a loud fan inside, but no way in hell I can hear them when I'm at gig or practice volume.
     
  8. sleewell

    sleewell Member

    Messages:
    8,184
    Joined:
    Sep 10, 2012
    Location:
    Michigan
    just for clarification, this is not how you should be micing your amp


    [​IMG]
     
  9. SirGilmour

    SirGilmour Supporting Member

    Messages:
    9,893
    Joined:
    Aug 8, 2012
    Location:
    Fort Wayne Indiana

    SO MUCH WIN HERE!
     
  10. Optimus Rhyme

    Optimus Rhyme Member

    Messages:
    177
    Joined:
    Jul 8, 2014
    Location:
    Ontario, Canada
    I don't find it bothers me so much while playing, it's the time in between songs that drives me nuts. It's like if you're playing in a bar with bad power and the PA is buzzing or your amp is buzzing....you don't notice it when you're playing but it's when you stop.

    I didn't think this was going to turn into a joke thread....I was generally curious if you thought the fan was of any significant benefit to the tubes or the heat disapation on the chassis.
     
  11. JB6464

    JB6464 Member

    Messages:
    2,619
    Joined:
    Feb 7, 2010
    Location:
    Cowtown
    :spit
     
  12. Tylenol Jones

    Tylenol Jones Member

    Messages:
    2,373
    Joined:
    Nov 12, 2014
    Let the children have their fun. It's what people do around here.

    Anyway, as a serious response, I'd suggest you look into another fan that runs silently and install that one instead. There's a possibility that fan is becoming defective or has gunk in it that's creating extra noise. You can easily find dead-silent fans at computers stores, so I'd suggest installing one of those and getting the best of both worlds ; silence and safety for your amp.
     
  13. bbaug14

    bbaug14 Supporting Member

    Messages:
    1,229
    Joined:
    Sep 23, 2008
    Location:
    Rochester, MI
    Agreed. Fans in amps are generally 12V and garbage. Go out and get a good one. Easy to fix. As for needing a fan, hard to say really. If it's a PCB based design with low rated components, it may actually be necessary. I doubt it, but it is feasible.
     
  14. BacchusPlateau

    BacchusPlateau Member

    Messages:
    893
    Joined:
    Sep 29, 2011
    Location:
    Canada
    The amp in my Mark V has been running non stop for about 5 years. I turned it off once to hear the difference but I don't really mind the fan noise, its really quiet anyway. It doesn't even bother me at "baby sharing a wall with your music room" levels
     
  15. The Funk

    The Funk Member

    Messages:
    4,331
    Joined:
    Feb 27, 2007
    The fan in my LSS is pretty quiet. I can hear it if I'm listening for it and not playing. And close to the amp.

    I might turn it off if I was recording something clean and in 5 watt mode and very quiet. But otherwise I'd rather have it on because that amp runs its power tubes super hot and I'd rather they didn't die.
     
  16. J M Fahey

    J M Fahey Member

    Messages:
    2,162
    Joined:
    May 22, 2009
    C'mon, relax a little, it's "The Gear Page" ;)

    Back to your problem:
    I often install fans in unbearably hot amps (think Matchless or real VOX), I use standard 12V PC supply fans but run them out of rectified 6.3V (filaments) , I get some 8 to 9V DC which is a bonus: fan runs at much less speed, practically silent, and still moves air inside the amp, which is what we need.

    There's a study somewhere that most of the cooling effect of a fan lies in the first 20 or 30% of its rotation speed, moving air even if slower is miles ahead of praying convection will take hot air away.

    The benefit is not for the tubes themselves, you can cool the glass but not the plates, there's *vacuum* between them (that's what Thermos flasks do, by the way) but cools overall, which is *good* , specially for Electrolytics.
     

Share This Page